Long animation render tip...

Render to image files!

Here are just a few reasons:
You can interupt the amination, restarting where you left off.
You can peek at the progress. (I use Quicktime for this because it has an option to open image sequences and it's very easy to use.)
If you discover a goof you can make changes and pickup rendering right before the mistake.
If Poser freezes (Imagine that!) you can restart from where ever it croaked.
If you need to do a bit of post work it's easy to work with individual images.
You have an alpha channel to work with if you are doing compositing work.

"OK, how do I pickup where I left off?" you ask. On the key frame editor there is a green bar at the bottom of the window. That is the animation range. Slide the little triangles at either end to set the range. Set the start point to the next frame after the last (good) frame rendered.

Nerd